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Technical matters > Peugeot 407 - 05 2.0HDi depollution/additive system fault
Thread Author: Artur99 Replies: 6
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 Thu 5 Nov 09 18:00 
 05 2.0HDi depollution/additive system fault - Artur99
Hello, I am new to this forum and looking for some help to fix my pug. Any help is welcome and I want to share my information as well.

I’ve got Peugeot 407 2.0 HDI with the depollution system faulty. Since that fuel consumption a bit increased and reveres sometimes dropping. After scanning with OBD2 scanner the following faults codes been found

P1435 – Additive system fault (unfortunately I can’t scan additive ECU)
P0461 - Fuel Level Sensor Performance
P2408 - Fuel Cap Sensor

After cleaning fault codes P1435 only comes on after engine start, but after few more starts and other two comes again.
I did research and it is linked to additive system. Is P2408 relative to P1435?

I noticed when I remove the fuel cap (both magnets present) and put it back the additive system pump starts work in about 5min and fluid goes to the fuel tank (as I have disconnected additive fluid pipe from fuel tank to check) is it mean that fuel filler cap sensor and cap is not faulty? So why I’ve got P2408? Or it is need replacing anyway
Also I have removed and checked additive system tank and it’s half full of fluid, so do not need to top up.

The other thing where is fuel level sensor in this model? Is it possible to replace it separately or it is integrated in fuel tank?

Does anyone have any ideas? Thanks
Last edited by: Dynamic Dave on Thu 5 Nov 09 at 18:55
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 Sat 7 Nov 09 14:33 
 05 2.0HDi depollution/additive system fault - Artur99
just for update,

new fuel filler cap sensor has been fitted and ECU resetted but P2408 fault appeared again which is totally confused me. will go for peugeot planet scan today
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 Mon 9 Nov 09 11:30 
 05 2.0HDi depollution/additive system fault - Artur99
it seems these multiply errors related to additivie ecu fault.
does anyone know where is additive ecu in 407 2.0 hdi?>> just for update
>>
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 Mon 9 Nov 09 13:33 
 05 2.0HDi depollution/additive system fault - adverse camber
If you do a forum search for posts in technical by user Screwloose you should find some info. He doesn't seem to visit any more though :(
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 Tue 10 Nov 09 15:47 
 05 2.0HDi depollution/additive system fault - glowplug
Try a strip and clean of the pressure sensor that senses if the DPF is blocking up. Following this a forced re-gen of the DPF would be needed. Was a dealer tool used to get and clear the codes?

Steve.
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 Sun 15 Nov 09 21:07 
 05 2.0HDi depollution/additive system fault - Artur99
hi, Steve,

where is that sensor is?

i used pp2000 for scaning and clearing the codes. the funny thing is it shows fuel filter cap sensor faulty, additive pump, when actually fuel cap sensor is new and the additve pump working and injecting fluid in the fuel.

thanks Artur
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 Thu 19 Nov 09 12:04 
 05 2.0HDi depollution/additive system fault - glowplug
You don't say whether the DPF has been replaced or cleaned. Main dealers will only replace it whereas some indys will steam clean it, however be aware that the run off from such cleaning is classified as hazardous waste.

If you follow the small pipes back from the DPF you'll find the sensors.

The fault code could well be false alarms triggered by the blocked DPF.

Steve.
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